Adjusting Ignition Timing

Hi,

I was wondering if somebody could quickly explaain how you adjust the ignition timing. I know that i attacth the gun to HT lead 1, and then point the strobe into the timing hole, but once i have seen that the timing is out, how do i adjust it ? I think i take the dizzy off and adjust the rotor arm ?

Thanks very much,

Ali 

loosen the dizzy clamp bolt, and rotate the dizzy left and right till the mark lines up